The weekend forecast has highs in the mid 50s for Saturday and around 50 degrees for Sunday, said Faye Barthold, a meteorologist with the service's Upton office. Photo Credit: Weather Underground

The weekend forecast has highs in the mid 50s for Saturday and around 50 degrees for Sunday, said Faye Barthold, a meteorologist with the service's Upton office. (Credit: Weather Underground)

Grab a heavy sweater or coat while heading out the next few days -- especially Sunday, when highs will reach only about 50 degrees across Long Island -- about 14 degrees below normal.

"It'll be quite chilly," said Faye Barthold, a meteorologist for the National Weather Service's Upton office. "It's cold out there now and it'll be cold out there all day today [Sunday]. Today, tonight, tomorrow...

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Grab a heavy sweater or coat while heading out the next few days -- especially Sunday, when highs will reach only about 50 degrees across Long Island -- about 14 degrees below normal.

"It'll be quite chilly," said Faye Barthold, a meteorologist for the National Weather Service's Upton office. "It's cold out there now and it'll be cold out there all day today [Sunday]. Today, tonight, tomorrow and Friday will all be cooler than normal."

Temperatures will continue to be in the mid-60s for the highs on Wednesday, when it will again be mostly sunny with lows at night around 50.

Thursday brings another day of highs around the mid-60s and more sun with temperatures at night in the mid to upper 40s.

Cooler weather returns for the start of the weekend on Friday, when highs will reach only the upper 50s, but it will be sunny. "It'll be a little cooler again at night," Barthold said, with temperatures in the lower to mid 40s.